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#### 15.4.1 Colors

Colors may be specified in three ways: 1) RGB triplets, 2) by name, or 3) by HTML notation.

RGB triplet

  An RGB triplet is a 1x3 vector where each value is between 0 and 1 inclusive. The first value represents the percentage of Red, the second value the percentage of Green, and the third value the percentage of Blue. For example, `[1, 0, 1]` represents full Red and Blue channels resulting in the color magenta.

short or long name

  Eight colors can be specified directly by name or by a single character short name.

  Name | Color
  --- | ---
  ‘`k`’, `"black"` | blacK
  ‘`r`’, `"red"` | Red
  ‘`g`’, `"green"` | Green
  ‘`b`’, `"blue"` | Blue
  ‘`y`’, `"yellow"` | Yellow
  ‘`m`’, `"magenta"` | Magenta
  ‘`c`’, `"cyan"` | Cyan
  ‘`w`’, `"white"` | White

HTML notation

  HTML notation is a string that begins with the character ‘`#`’ and is followed by either 3 or 6 hexadecimal digits. As with RGB triplets, each hexadecimal number represents the fraction of the Red, Green, and Blue channels present in the specified color. For example, `"#FF00FF"` represents the color magenta.